How to add padAngle to one edge of arc using d3.js - d3.js

Question

Can anyone tell me How to add padAngle to one edge of arc using d3.js ?
I have created donut chart using d3.js. And found that there is an option to add space between arcs using .padAngle(). I achieved it. As per my requirement I need to add padding only one side of arc.
Can anyone suggest me how can I achieve it ?
As per my requirement, I should add extra padding for every 3 arcs. So I am passing padding using paddingFunction(it's customized) on top of arc. But it's adding both sides.
Below is my code:
var data = [46.00, 67, 50.00, 10.00,30.00,40.00],
color = ['red', 'green', 'black', 'pink','blue','orange'],
grpStrk = [0.1, 0.1, 0.5, 0.1, 0.1, 0.5],
width = '272',
height = '272',
radius = height/2 - 11;
/* function to render donut chart as per values and colors */
function renderSavingsDonutChart(data, color, grpStrk) {
try {
d3
} catch (err) {
return false;
}
/* function to return padding for chart arc based on flag to differenciate groups */
var paddingFunction = function(d,i) {
return grpStrk[i];
};
var arc = d3.svg.arc().innerRadius(radius-20).outerRadius(radius);
var pie = d3.layout.pie().sort(null);
if(isMobile()){
width = 257;
height = 257;
var arc = d3.svg.arc().innerRadius(radius-25).outerRadius(radius);
var forVbWidth = width-4;
var forVbHeight = height-4;
var svg = d3.select("#results-donut-chart").append("svg").attr("width", width).attr("height", height).attr("viewBox","2 2 " + forVbWidth + " " + forVbHeight).attr("preserveAspectRatio","xMidYMid").append("g").attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
}else{
var svg = d3.select("#results-donut-chart").append("svg").attr("width", width).attr("height", height).attr("viewBox","9 9 " + (width-19) + " " + (height-19)).attr("preserveAspectRatio","xMidYMid").append("g").attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");
}
svg.selectAll("path")
.data(pie(data))
.enter()
.append("path")
.style(
{
"fill": function(d, i) {
return color[i];
}
})
//.attr("d", arc);
.attr("d", arc.padAngle(paddingFunction));
//On Resize
var aspect = width / height,
chart = $("#results-donut-chart svg");
$(window).on("resize load", function() {
var targetWidth = chart.parent().width();
chart.attr("width", targetWidth);
chart.attr("height", targetWidth / aspect);
});
}
/*Calling savings donut on page load*/
renderSavingsDonutChart(data, color, grpStrk);